Turbulent Wakes in a Stratified Fluid. Part 1: Model Development, Verification, and Sensitivity to Initial Conditions

Abstract

A computational model has been developed for the turbulent wake of a body moving through a stably stratified fluid. Details of the wake growth, collapse and generation of internal waves were examined by the application of a second-order closure approach to turbulent flow developed at A.R.A.P. over the past few years. Predictions of the model have been verified by comparison with a wide variety of wake flows including wakes with no momentum, wakes with axial momentum, wakes with angular momentum, and for wakes in both stratified and unstratified fluids. A sensitivity investigation reveals that the primary variable affecting the strength of the generated internal waves is the initial Richardson number, with the first local maximum of the vertical height of the wake scaling inversely with the 1/8th power of the initial Richardson number.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1974
Accession Number
ADA012873

Entities

People

  • Coleman Dup. Donaldson
  • Milton Teske
  • W. S. Lewellen

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angular Momentum
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Froude Number
  • Internal Waves
  • Mechanical Phenomena
  • Mechanical Properties
  • Richardson Number
  • Stratified Fluids
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Coastal Oceanography
  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.